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