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