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