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