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)(23,28)(24,27)(25,29)(26,30)(31,36)(32,34)(33,35)(1,2)(3,4)(6,9)(10,12)(22,27)(23,31)(25,26)(28,35)(32,33)(34,36) involution — undirected(2,4)(5,7)(6,10)(8,11)(9,12)(14,17)(18,20)(21,23,26,33,24,32,25,31)(22,28,30,35,27,34,29,36)(7,11)(10,12)(13,15,16,19)(14,18,17,20)(22,27)(23,32)(29,30)(31,33)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.