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