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