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