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