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