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