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