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