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