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