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