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