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