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