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