here are the little riffs they play over the chords, those are the basic little sounds, i dont show the details or how many times to play each pair because its simple enough to figure out, but a pain to tab.
e-------------------------------------
B----------------------12--10--8--
G------9---10--12--12--10--9--
D----10---12--12-----------------
A-------------------------------------
E-------------------------------------
e-------------------------------------
B------------------------------------
G------9-----12---10---7--------
D----10-----12---12---9-------
A-------------------------------------
E-------------------------------------
This song and many others are located at the official unofficial My Morning Jacket guitar tabs and chords site:
http://mmjtabs.50megs.com/