First riff

C#|---------------------------------------------------------------------------|
G#|---------------------------------------------------------------------------|
E |---------------------------------------------------------------------------|
B |---------------------------------------------------------------------------|
F#|-----------------7-5---------7-5--5----------------------------------------|
C#|-0-0-0-0-0-0-0-0-----7-7-7-7-------6-6-0-3-3-3-3---------------------------|
    . . . . . . . .                                                      
Apart from the intro riff at the start of the song, the 0 are all palm mute powerchords


Second riff 

C#|---------------------------------------------------------------------------|
G#|---------------------------------------------------------------------------|
E |---------------------------------------------------------------------------|
B |---------------------------------------------------------------------------|
F#|---------------------------------------------------------------------------|
C#|-0-0-0-0-0-0-/17-17-1-0--1-1-2-2--1-0--1-1-2-2-----------------------------|
    . . . . . .          .             .


Third riff

C#|---------------------------------------------------------------------------|
G#|---------------------------------------------------------------------------|
E |---------------------------------------------------------------------------|
B |---------------------------------------------------------------------------|
F#|-9-5-4/5-2-2---9-5-4/5-----------------------------------------------------|
C#|-7-3-2/3-0-0---7-3-2/3-1b--------------------------------------------------|
            . .           


Fourth riff

C#|---------------------------------------------------------------------------|
G#|---------------------------------------------------------------------------|
E |---------------------------------------------------------------------------|
B |---------------------------------------------------------------------------|
F#|---------------------------------------------------------------------------|
C#|-0-7-0-7-0-7-2/3-3-3-3-3-3-------------------------------------------------|
                    . . . . .
Then they repear the third and fourth riff until the end of the song.


************************************

| .   Palm mute
| b   Bend

************************************