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