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