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