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