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