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