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