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)(17,18,24,27)(19,28,22,25)(20,23,21,26)(29,30,31,32)(33,34)(35,36)(37,40)(38,41)(39,42)(43,44)(45,46)(47,48)(2,8)(5,9)(10,15)(13,16)(17,19,24,22)(18,25,27,28)(20,31,21,29)(23,30,26,32)(33,35)(34,36)(37,43)(38,39)(40,44)(41,42)(45,48)(46,47)(1,3,7,4)(2,9,8,5)(6,11,14,12)(10,16,15,13)(17,20,24,21)(18,26,27,23)(19,29,22,31)(25,30,28,32)(33,34)(35,42)(36,39)(37,40)(38,41)(43,48)(44,47)(45,46)(1,4,7,3)(2,9,8,5)(6,11,14,12)(10,13,15,16)(17,21,24,20)(18,23,27,26)(19,29,22,31)(25,30,28,32)(33,34)(35,36)(37,45)(38,41)(39,42)(40,46)(43,48)(44,47)(1,5,7,9)(2,4,8,3)(6,13,14,16)(10,12,15,11)(17,22,24,19)(18,25,27,28)(20,31,21,29)(23,32,26,30)(33,36)(34,39)(35,41)(37,44)(38,42)(40,47)(43,45)(46,48)(1,6,7,14)(2,10,8,15)(3,11,4,12)(5,13,9,16)(17,23)(18,20)(19,30)(21,27)(22,32)(24,26)(25,31)(28,29)(33,37)(34,40)(35,43)(36,44)(38,46)(39,47)(41,45)(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.