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