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