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