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