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