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