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