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