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