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