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)(33,34,38,41)(35,42,36,39)(37,40,45,48)(43,47,44,46)(1,3,7,16)(2,8,9,12)(4,13,14,5)(6,15,10,11)(17,18)(19,26)(20,21)(22,23)(24,29)(25,31)(27,28)(30,32)(33,34,38,41)(35,42,36,39)(37,40,45,48)(43,47,44,46)(2,9)(6,10)(8,12)(11,15)(18,23)(21,25)(24,26)(28,32)(33,35,38,36)(34,39,41,42)(37,44,45,43)(40,47,48,46)(1,4)(2,10)(3,13)(5,16)(6,9)(7,14)(8,11)(12,15)(17,19,22,29)(18,24,23,26)(20,30,31,27)(21,28,25,32)(33,36,38,35)(34,39,41,42)(37,44,45,43)(40,46,48,47)(1,5,7,13)(2,11,9,15)(3,14,16,4)(6,8,10,12)(17,20)(18,25)(19,27)(21,23)(22,31)(24,28)(26,32)(29,30)(33,34)(35,39)(36,42)(37,40)(38,41)(43,46)(44,47)(45,48)(1,6,7,10)(2,4,9,14)(3,15,16,11)(5,8,13,12)(17,21,22,25)(18,20,23,31)(19,28,29,32)(24,30,26,27)(33,37,38,45)(34,40,41,48)(35,43,36,44)(39,46,42,47)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.