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