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