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