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