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