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