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