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