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