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