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