One vertex per element, one color per generator, with an edge from x to x·s.
(2,4)(5,6,10,9)(7,12,11,8)(13,14,18,20)(15,19,17,16)(1,2)(3,4)(5,7)(6,8)(9,12)(10,11)(13,15,18,17)(14,19,20,16)(5,8)(6,11)(7,9)(10,12)(13,16,18,19)(14,17,20,15)(5,7)(6,8)(9,12)(10,11)(13,16)(14,15)(17,20)(18,19) involution — undirected(5,9,10,6)(7,12,11,8)(13,17,18,15)(14,16,20,19)(5,7)(6,12)(8,9)(10,11) 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.