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