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