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