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