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