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