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