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