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