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)(19,26,25,22)(20,28,30,24)(27,31,29,32)(2,5)(3,7)(9,10)(11,14)(12,13)(15,16)(18,23)(19,25)(24,28)(27,29) involution — undirected(2,5)(6,8)(10,13)(14,16)(17,19,22,18,21,25,26,23)(20,29,31,28,30,27,32,24)(2,5)(6,8)(9,11,12,15)(10,14,13,16)(17,20,21,30)(18,24,23,28)(19,27,25,29)(22,31,26,32)(1,3,4,7)(2,6,5,8)(10,13)(14,16)(20,30)(24,28)(27,29)(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.