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