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