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)(35,44)(36,48,51,41)(37,42)(38,52)(39,43)(40,46)(45,59,61,58)(47,55)(49,63,50,57)(53,56)(54,60,62,64)(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)(36,45)(37,46)(38,53)(39,47)(41,54)(42,55)(43,56)(44,52)(48,62)(49,60)(50,64)(51,61)(57,59)(58,63) 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)(35,45)(37,49)(38,50)(39,51)(40,54)(42,57)(43,48)(44,58)(46,60)(47,61)(52,63)(53,64)(55,59)(56,62) involution — undirected(2,9)(7,11)(8,15)(10,24)(21,27)(22,25)(23,26)(31,32)(33,37,39,38)(34,42,43,52)(35,46,47,53)(36,49,51,50)(40,55,56,44)(41,57,48,63)(45,60,61,64)(54,59,62,58)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.