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