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