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