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