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