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