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