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