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)(20,25,21,26)(28,31,29,32)(2,5)(6,8)(17,19,22,30)(18,24,23,27)(20,31,21,32)(25,28,26,29)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(17,20)(18,25)(19,28)(21,22)(23,26)(24,32)(27,31)(29,30)(17,21,22,20)(18,26,23,25)(19,29,30,28)(24,31,27,32)(9,11,12,15)(10,14,13,16)(17,18,22,23)(19,24,30,27)(20,26,21,25)(28,31,29,32)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.