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