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