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