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