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