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