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