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