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