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