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