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