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