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