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