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