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