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