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