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