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