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