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