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