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