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