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