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