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