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