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