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