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