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