Intro

e-----------------|
B-----------------|
G-----------------|
D-----------------|
A-3-3-3-h-5-------|
E-----------------|

e------------------|
B------------------|
G------------------|
D------------------|
A-3-3-3-h-5-p-3--5-|
E----------------3-|

Main riff

e----------------------------------------------|
B----------------------------------------------|
G----------------------------------------------|
D----------------------------------------------|
A-(3)-3-h-5-5-5-3-3-5-5-5--3-3-3-h-5-p-3-3-3-3-|
E----------------------------------------5-5-5-|   Note in () not played
                                                 first time
Mid Section
e--------------------|
B--------------------|
G-7------------------|
D-7------------------|
A-5-------5----------|
E---------3----------|

Outro riff
e-----------------------|
B-------6---------6-----|
G-5-h-7---7-5-h-7---7-5-|
D-----------------------|   Repeat riff several times.
A-----------------------|
E-----------------------|

Changes later to:

e----------------------|
B-------6-6------------|
G-5-h-7-7-7------------|
D-0-----0-0------------| Repeat riff until end of song.
A----------------------|
E----------------------|

The effects I find best are distortion and a phaser effect.