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