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