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