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