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