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