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