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