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