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