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