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