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