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