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