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