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