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