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