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