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