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