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