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