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