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