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