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