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