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