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