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