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