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