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