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)(17,18,22,25)(19,26,20,23)(21,24,29,32)(27,31,28,30)(33,34,40,44)(35,38,41,36)(37,47,46,42)(39,48,45,43)(1,2,6,3)(4,9,12,7)(5,8,14,10)(11,16,13,15)(17,19,22,20)(18,23,25,26)(21,27,29,28)(24,30,32,31)(33,35)(34,36)(37,45)(38,44)(39,46)(40,41)(42,43)(47,48)(2,3)(7,9)(8,10)(15,16)(33,36,40,38)(34,41,44,35)(37,48,46,43)(39,42,45,47)(1,3,6,2)(4,7,12,9)(5,10,14,8)(11,15,13,16)(17,18)(19,23)(20,26)(21,24)(22,25)(27,30)(28,31)(29,32)(33,37,40,46)(34,42,44,47)(35,45,41,39)(36,43,38,48)(1,4)(2,7)(3,9)(5,13)(6,12)(8,16)(10,15)(11,14)(17,20,22,19)(18,23,25,26)(21,27,29,28)(24,31,32,30)(33,38,40,36)(34,41,44,35)(37,43,46,48)(39,42,45,47)(1,5)(2,8)(3,10)(4,11)(6,14)(7,15)(9,16)(12,13)(17,21)(18,24)(19,27)(20,28)(22,29)(23,30)(25,32)(26,31)(33,39,40,45)(34,43,44,48)(35,46,41,37)(36,42,38,47)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.