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)(11,13,15,16)(12,14)(17,18,21,26,23,27,22,37)(19,28,31,44,29,42,32,47)(20,33,34,39,36,48,35,25)(24,38,41,45,40,46,43,30)(2,5)(6,7)(9,11,12,15)(10,13)(14,16)(17,19,20,30,21,31,34,38,23,29,36,45,22,32,35,46)(18,24,39,42,37,43,33,44,27,40,25,28,26,41,48,47)(1,3,4,8)(2,6,5,7)(19,29)(24,40)(28,42)(30,45)(31,32)(38,46)(41,43)(44,47)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.