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