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)(18,21)(22,24)(25,26,29,30)(27,31,32,28)(2,3)(4,8)(9,10,12,13)(11,15,16,14)(19,23)(22,24)(27,32)(28,31)(2,3)(6,7)(10,13)(14,15)(17,18)(19,22)(20,21)(23,24)(25,27)(26,28)(29,32)(30,31) involution — undirected(1,3,5,2)(4,7,8,6)(9,10)(11,14)(12,13)(15,16)(17,19)(18,22)(20,23)(21,24)(25,28)(26,27)(29,31)(30,32)(1,4,5,8)(2,6,3,7)(9,11,12,16)(10,14,13,15)(17,18)(19,22)(20,21)(23,24)(25,26)(27,28)(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.