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