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