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