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