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