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