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