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