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