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