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