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