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