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