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