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