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