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