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