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