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