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