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