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)(19,25)(20,27)(30,32)(33,34)(35,39)(36,40)(37,38)(41,46)(42,45)(43,44)(47,48)(1,3,4,7)(2,5,6,8)(18,22)(19,25)(24,29)(26,31)(34,38)(39,45)(40,43)(46,47)(1,3)(2,5)(4,7)(6,8)(9,10,12,14)(11,13,15,16)(17,18)(19,23)(20,24)(21,22)(25,28)(26,30)(27,29)(31,32)(33,34)(35,39)(36,43)(37,38)(40,44)(41,47)(42,45)(46,48)(9,11,12,15)(10,13,14,16)(17,19,21,25)(18,23,22,28)(20,26,27,31)(24,30,29,32)(33,35,37,42)(34,39,38,45)(36,41,44,48)(40,46,43,47)(1,2)(3,5)(4,6)(7,8)(17,20)(18,24)(19,26)(21,27)(22,29)(23,30)(25,31)(28,32)(33,36,37,44)(34,40,38,43)(35,41,42,48)(39,46,45,47)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.