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