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