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