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