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