One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,10,7,11,5,20)(3,12,16,26,15,8,14,23)(4,17,18,24,19,9,21,25)(13,27,28,31,29,22,30,32)(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)(1,3,7,15)(2,8,11,12)(4,13,19,29)(5,16,6,14)(9,22,17,27)(10,26,20,23)(18,30,21,28)(24,32,25,31)(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)(2,9)(3,13)(5,18)(6,21)(7,19)(8,22)(10,24)(11,17)(12,27)(14,28)(15,29)(16,30)(20,25)(23,31)(26,32)(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(1,5,7,6)(2,10,11,20)(3,14,15,16)(4,18,19,21)(8,23,12,26)(9,24,17,25)(13,28,29,30)(22,31,27,32)(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.