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