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