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