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