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