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