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