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