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