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