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