The song is originally in half step down, but I find it easier to play in drop D: so D A 
G B E (from low to high)


Main Riff

----------------------------|
----------------------------|
----------------------------|
--0-0-0-0-0-0-0-0-1-0-0-1---|
--0-0-0-0-0-0-0-0-1-0-0-1---|
--0-0-0-0-0-0-0-0-1-0-0-1---|
PM|--------------|  |-------|


Riff 2:
---------|
---------|
---------|
-7-6-5-4-|
-7-6-5-4-|
-7-6-5-4-|


Riff 3: (I don't know how many times this is exactly and the timing is difficult)
----------------------------|
----------------------------|
----------------------------|
--00000000000000000--8-7----|
--00000000000000000--8-7----|
--00000000000000000--8-7----|
PM|-------------------------|


PM = Palm Muting lay the palm of your right hand on the strings so it gets half muted.