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