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