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