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