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