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