One vertex per element, one color per generator, with an edge from x to x·s.
(9,10,13,14)(11,15,17,18)(12,20,22,16)(19,24,21,23)(25,26)(27,35)(28,33)(29,34)(30,31)(32,36)(37,40)(38,39)(1,2)(3,7)(4,6)(5,8)(10,14)(11,17)(16,20)(19,21)(26,31)(27,36)(33,38)(34,37) involution — undirected(1,3)(2,5)(4,8)(6,7)(10,14)(15,18)(16,20)(23,24) involution — undirected(2,6)(5,7)(9,10)(11,18)(12,16)(13,14)(15,17)(19,24)(20,22)(21,23)(25,27)(26,32)(28,34)(29,38)(30,36)(31,35)(33,40)(37,39) involution — undirected(1,2)(3,5)(4,6)(7,8)(9,11,13,17)(10,15,14,18)(12,21,22,19)(16,24,20,23)(25,28,30,39)(26,33,31,38)(27,37,36,34)(29,35,40,32)(1,3)(2,7)(4,8)(5,6)(9,12,13,22)(10,16,14,20)(11,19,17,21)(15,23,18,24)(25,29)(26,34)(27,38)(28,32)(30,40)(31,37)(33,36)(35,39)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.