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