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)(11,14)(12,13)(15,16)(17,18)(19,22)(20,21)(23,24)(25,26)(27,30)(28,32)(29,31) involution — undirected(1,3,5,4)(2,6,7,8)(9,10,12,13)(11,14,16,15)(18,21)(19,24)(25,27,29,32)(26,30,31,28)(2,7)(6,8)(10,13)(14,15)(17,19,20,24)(18,22,21,23)(25,28)(26,27)(29,30)(31,32)(1,4,5,3)(2,8,7,6)(9,11,12,16)(10,14,13,15)(17,18)(19,22)(20,21)(23,24)(25,27)(26,28)(29,32)(30,31)(1,2)(3,8)(4,6)(5,7)(9,10)(11,15)(12,13)(14,16)(17,19)(18,23)(20,24)(21,22)(25,28)(26,27)(29,30)(31,32) 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.