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