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