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