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