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