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