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