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