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