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