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