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