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