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