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