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