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