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)(17,18,23,28,24,29,22,27)(19,30,32,39,33,43,21,25)(20,26,35,40,36,41,37,42)(31,44,45,48,46,47,34,38)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,14)(13,16)(17,19,24,33)(18,25,29,39)(20,31,36,46)(21,22,32,23)(26,38,41,48)(27,30,28,43)(34,37,45,35)(40,47,42,44)(2,6)(5,7)(9,11,12,16)(10,13,14,15)(17,20)(18,26)(19,31)(21,34)(22,37)(23,35)(24,36)(25,38)(27,42)(28,40)(29,41)(30,44)(32,45)(33,46)(39,48)(43,47)(3,8)(5,7)(11,16)(13,15)(17,21,23,19,24,32,22,33)(18,25,28,30,29,39,27,43)(20,34,35,31,36,45,37,46)(26,38,40,44,41,48,42,47)(10,14)(13,15)(17,22,24,23)(18,27,29,28)(19,32,33,21)(20,35,36,37)(25,30,39,43)(26,40,41,42)(31,34,46,45)(38,47,48,44)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.