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