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