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