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