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