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