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