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