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