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