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