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