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