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