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