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