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