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