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