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