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