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