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