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