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