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