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