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