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