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