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