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