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