the song is pretty much the same cords over and over again. except for
the 
G
 chord.  It starts out with the full 
G
 and then when you come back it is
played with just one finger on the small e string (not another finger on the
string right above that), then back to the full 
G
.  Here it is:

>--3--------0--------0--------3-----------------------------------<
>--2--------0--------3--------2-----------------------------------<
>--0--------2--------2--------0-----------------------------------<
>--0--------2--------0--------0-----------------------------------<
>--3--------1--------1--------0-----------------------------------<
>--3--------0--------0--------3-----------------------------------<


The strumming is something around down-down-up-down, except for the first chord
which is a little bit longer.  Just repeat this until the end of the song.