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