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