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