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