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