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