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