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