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