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