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