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)(19,21)(20,22)(23,27)(24,28)(25,31)(26,29)(30,32)(1,3,5,4)(2,6,8,7)(9,11)(10,13)(12,15)(14,16)(17,19,23,31,24,26,22,30)(18,25,20,21,28,32,27,29)(1,3,5,4)(2,7,8,6)(11,15)(13,16)(17,20,23,28,24,27,22,18)(19,29,31,25,26,21,30,32)(1,4,5,3)(2,6,8,7)(10,14)(13,16)(17,21)(18,26)(19,28)(20,30)(22,25)(23,32)(24,29)(27,31)(17,22,24,23)(18,20,28,27)(19,30,26,31)(21,32,29,25)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.