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