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