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