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