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