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