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