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)(11,15)(12,14)(13,16)(17,18,24,19)(20,29,21,32)(22,28,23,27)(25,31,26,30)(2,5)(6,8)(9,11)(10,13)(12,16)(14,15)(17,19,24,18)(20,29,21,32)(22,27,23,28)(25,31,26,30)(10,14)(11,16)(17,20,22,30,24,21,23,31)(18,25,27,29,19,26,28,32)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,22,31,24,20,23,30)(18,26,27,32,19,25,28,29)(2,5)(6,8)(10,14)(13,15)(20,21)(25,26)(29,32)(30,31) involution — undirectedA 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.