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