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