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)(12,15)(17,18,21,19)(20,23,24,22)(25,26,29,32)(27,31,28,30)(1,2)(3,5)(4,6)(7,8)(9,10,14,13)(11,15,16,12)(18,19)(22,23)(25,27,29,28)(26,30,32,31)(1,2)(3,5)(4,6)(7,8)(9,11,14,16)(10,15,13,12)(17,19,21,18)(20,23,24,22)(25,26)(27,30)(28,31)(29,32)(1,2)(3,5)(4,6)(7,8)(9,12)(10,11)(13,16)(14,15) involution — undirected(1,3,4,8)(2,5,6,7)(9,13,14,10)(11,12,16,15)(17,20,21,24)(18,22,19,23)(25,28,29,27)(26,31,32,30)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.