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