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)(19,30)(20,26)(21,37)(22,27)(23,40)(24,29)(25,32)(28,39)(31,42)(33,41)(34,48)(35,44)(36,45)(38,43)(46,47)(1,3)(2,6,8,9)(4,11)(5,10)(7,14,15,16)(12,13)(17,19,22,33,23,34,39,32,24,35,36,47,20,31,21,38)(18,25,28,42,26,41,27,44,29,43,37,48,40,46,45,30)(3,10)(6,9)(11,13)(14,16)(17,20,24,23)(18,26,29,40)(19,31,35,34)(21,36,39,22)(25,41,43,46)(27,37,45,28)(30,42,44,48)(32,33,38,47)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.