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