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