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