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