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