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