One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,3,4)(5,6,8,7)(9,10)(11,15)(12,14)(13,16)(17,18)(19,29)(20,27)(21,24)(22,25)(23,28)(26,30)(31,32)(5,7,8,6)(9,11,12,16)(10,13,14,15)(17,19,20,31,23,30,22,21)(18,24,25,26,28,32,27,29)(2,4)(11,16)(13,15)(17,20,23,22)(18,25,28,27)(19,21,30,31)(24,29,32,26)(10,14)(13,15)(17,21,22,30,23,31,20,19)(18,26,27,24,28,29,25,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.