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