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