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