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