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