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