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