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