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