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