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)(20,33,37,44)(21,27,35,26)(23,31,39,30)(25,42,45,36)(29,43,34,38)(40,47,48,46)(1,3)(2,8)(4,14)(5,11)(6,13)(7,12)(9,16)(10,15)(17,19,21,30,22,32,35,31)(18,23,26,24,28,39,27,41)(20,34,36,47,37,29,42,46)(25,43,33,48,45,38,44,40)(1,4,6,2)(3,10,13,16)(5,9,7,15)(8,11,14,12)(17,19)(18,24)(20,29)(21,30)(22,32)(23,27)(25,40)(26,39)(28,41)(31,35)(33,43)(34,37)(36,46)(38,44)(42,47)(45,48)(17,20,35,42,22,37,21,36)(18,25,27,44,28,45,26,33)(19,29,31,47,32,34,30,46)(23,38,41,48,39,43,24,40)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.