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