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