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