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)(19,25,33,41)(20,26,38,46)(21,27,23,29)(22,28,32,40)(31,39,47,48)(34,42,36,44)(35,43,37,45)(1,2)(3,6)(4,5)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,24,33)(18,25,30,41)(20,34,38,36)(21,32,23,22)(26,42,46,44)(27,40,29,28)(31,35,47,37)(39,43,48,45)(10,14)(13,15)(17,20,21,35,24,38,23,37)(18,26,27,43,30,46,29,45)(19,31,22,36,33,47,32,34)(25,39,28,44,41,48,40,42)(1,3,4,7)(2,6,5,8)(10,14)(13,15)(17,21,24,23)(18,27,30,29)(19,32,33,22)(20,35,38,37)(25,40,41,28)(26,43,46,45)(31,34,47,36)(39,42,48,44)(2,5)(6,8)(11,16)(13,15)(17,22,23,19,24,32,21,33)(18,28,29,25,30,40,27,41)(20,36,37,31,38,34,35,47)(26,44,45,39,46,42,43,48)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.