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