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