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