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