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