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