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