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