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