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