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