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