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