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