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