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)(24,28)(25,30)(26,31)(27,35)(29,34)(33,36) involution — undirected(1,2,3,4)(5,7)(6,10)(8,14)(9,13)(11,16)(12,17)(15,19)(18,20)(21,23,26,24)(22,28,31,32)(25,34,27,33)(29,30,36,35)(7,13)(10,16)(14,19)(17,20)(21,24,26,23)(22,29,31,36)(25,34,27,33)(28,30,32,35)(6,11)(10,16)(12,18)(17,20) involution — undirected(5,8,9,15)(6,12,11,18)(7,14,13,19)(10,17,16,20)(21,25,26,27)(22,30,31,35)(23,33,24,34)(28,29,32,36)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.