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