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