That other tab sounded a bit wrong to me, here's my guess
G----------------------------------------|
D------------------------------------12--|
A-------------------------------10-------|
E--1212--12--1212--12--1212--12---10-----|
^^^^^^^^
repeat lots and sometimes leave out the underlined bit
other riff sounds more like this to me
G---------------------------------------|
D-------12----------14------------------|
A---------------------------------------|
E-10/12---12--10/12---12----------------|