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