Opening riff:
E|---------------------------------------------|
B|---------------------------------------------|
G|---------------------------------------------|
D|--7h8-7-5--5----5--------7-8-7-5--5----5-----|
A|---------8----7----5------------8----7----5--|
E|---------------------------------------------|

Strumming pattern:

This is repeated throughout the whole song by guitar 2. Guitar 1, when not playing the 
riff and the closing riff also plays this

    G                F      C7
E|--3-3-X--3--3-3-X--1-1-X--3-3-X--3-3---------|
B|--3-3-X--3--3-3-X--1-1-X--1-1-X--3-3---------|
G|--0-0-X--0--0-0-X--2-2-X--3-3-X--0-0---------|
D|---------------------------------------------|
A|---------------------------------------------|
E|---------------------------------------------|

Closing riff:
E|----------------------(-----------)|
B|----------------------(-----------)|
G|----------------------(-5b--------)| x4
D|--7-8-7-5--5----5-----(----8-7--5-)|
A|---------8----7----5--(-----------)|
E|----------------------(-----------)|

 h  = Hammer on
 b  = Bend
 X  = Percussive scratch
(-) = play quietly