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