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