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