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