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