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)(19,26)(20,27)(21,31)(22,25)(23,28)(24,29)(30,32)(5,7,8,6)(9,11,12,16)(10,13,14,15)(17,19,20,21,23,30,22,29)(18,24,25,32,28,31,27,26)(2,4)(11,16)(13,15)(17,20,23,22)(18,25,28,27)(19,29,30,21)(24,26,31,32)(10,14)(13,15)(17,21,20,30,23,29,22,19)(18,26,25,24,28,32,27,31)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.