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