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