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