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