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