One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,16,7,11,6,10)(3,12,13,8,4,15,14,9)(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)(1,3,5,13,7,4,6,14)(2,8,10,12,11,9,16,15)(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)(1,2,7,11)(3,8,4,9)(5,10,6,16)(12,14,15,13)(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)(1,4,6,13,7,3,5,14)(2,9,16,12,11,8,10,15)(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.