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