One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10,12,15,13,16,11,14)(17,18,22,27,30,44,36,26,21,25,37,43,23,28,20,35)(19,29,33,24,39,41,31,46,32,47,48,40,34,45,38,42)(2,5)(6,7)(10,14,16,15)(17,19,30,34,21,32,23,39)(18,24,28,46,25,40,44,42)(20,33,22,38,36,48,37,31)(26,45,27,29,35,41,43,47)(1,3,4,8)(2,6,5,7)(18,25)(24,40)(26,35)(27,43)(28,44)(29,47)(41,45)(42,46)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.