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)(11,12)(13,14)(15,16)(17,18)(19,23)(20,22)(21,24)(25,26)(27,30)(28,31)(29,32) involution — undirected(1,2,4,6)(3,5,8,7)(10,14)(12,15)(17,19,21,20)(18,22,24,23)(25,27,28,32)(26,29,31,30)(9,11)(10,15)(12,14)(13,16)(17,19,21,20)(18,23,24,22)(25,26)(27,30)(28,31)(29,32)(1,3,4,8)(2,5,6,7)(9,11)(10,12)(13,16)(14,15)(17,20,21,19)(18,23,24,22)(25,26)(27,29)(28,31)(30,32)(1,2)(3,7)(4,6)(5,8)(9,12)(10,16)(11,14)(13,15)(17,18)(19,23)(20,22)(21,24)(25,27)(26,30)(28,32)(29,31) 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.