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