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