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)(17,18,23,29)(19,31,20,34)(21,30,24,27)(22,38,40,46)(25,35,43,32)(26,33,45,36)(28,37,42,41)(39,47,48,44)(1,3,7,15)(2,8,4,16)(5,14,6,13)(9,12,10,11)(17,19,23,20)(18,25,29,43)(21,35,24,32)(22,36,40,33)(26,28,45,42)(27,34,30,31)(37,48,41,39)(38,47,46,44)(1,4,7,2)(3,12,15,11)(5,9,6,10)(8,13,16,14)(17,20,23,19)(18,26,29,45)(21,35,24,32)(22,39,40,48)(25,42,43,28)(27,44,30,47)(31,38,34,46)(33,41,36,37)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.