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