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