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