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