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