One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,7,13,8,15,34,14)(3,16,21,50,22,46,20,36)(4,23,27,58,28,48,60,42)(5,12,30,11,31,47,6,32)(9,19,38,18,39,56,37,29)(10,40,43,33,45,25,44,26)(17,51,54,41,55,35,24,59)(49,61,62,57,64,52,63,53)(1,3,5,29,7,20,30,56,8,22,31,18,34,21,6,19)(2,9,32,16,14,38,47,50,15,39,11,46,13,37,12,36)(4,24,40,57,27,55,33,61,28,54,25,53,60,17,26,52)(10,41,42,62,44,35,48,64,45,59,58,63,43,51,23,49)(1,4,5,25,7,27,30,26,8,28,31,40,34,60,6,33)(2,10,11,42,14,44,12,48,15,45,32,58,13,43,47,23)(3,17,18,52,20,24,19,57,22,55,29,61,21,54,56,53)(9,35,16,49,38,59,50,62,39,51,46,64,37,41,36,63)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.