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)(25,26,30,33)(27,35,36,50)(28,32,40,49)(29,42,43,34)(31,44,45,38)(37,51,39,54)(41,56,52,48)(46,55,47,53)(9,11)(10,14)(12,19)(13,18)(15,23)(16,22)(17,20)(21,24)(25,27,29,38,30,36,43,44)(26,31,34,35,33,45,42,50)(28,39,41,55,40,37,52,53)(32,47,48,54,49,46,56,51)(1,3,5,4)(2,6,7,8)(9,12,13,20)(10,15,16,24)(11,17,18,19)(14,21,22,23)(27,36)(31,45)(35,50)(37,39)(38,44)(46,47)(51,54)(53,55)(11,18)(14,22)(17,19)(21,23)(25,28)(26,32)(27,37)(29,41)(30,40)(31,46)(33,49)(34,48)(35,51)(36,39)(38,53)(42,56)(43,52)(44,55)(45,47)(50,54) involution — undirected(1,4,5,3)(2,6,7,8)(10,16)(14,22)(15,24)(21,23)(26,33)(28,40)(31,45)(34,42)(35,50)(37,39)(41,52)(53,55)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.