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