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