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