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