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