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