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