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