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