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