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