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