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