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