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