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