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