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