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