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