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