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