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