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