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