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