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