I noticed that the little riff during the G chord wasn't written down, so I tabbed it. Here ya go.

E------------------|
B------------------|
G------------------|
D--------3---------|
A----3H5---5-3-1---|
E--3-------------3-|

Just repeat that everytime the G chord is used. Besides that, it's just standard 
in the verse and C-D-C-G for the chorus.