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