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