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