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