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