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