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