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