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