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