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