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