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