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