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