One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,8)(9,10,13,12)(11,15,16,14)(17,18)(19,29)(20,25)(21,28)(22,27)(23,26)(24,30)(31,32)(9,11,13,16)(10,14,12,15)(17,19,21,30,22,31,23,20)(18,24,26,29,27,25,28,32)(2,4)(10,12)(14,15)(17,20,22,30)(18,24,27,25)(19,21,31,23)(26,32,28,29)(6,8)(9,12,13,10)(11,15,16,14)(17,19,21,30,22,31,23,20)(18,25,26,32,27,24,28,29)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.