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