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