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)(21,22,27,32)(23,29,33,36)(24,28,34,35)(25,31,26,30)(2,4)(5,7)(6,10)(8,15)(9,14)(11,19)(12,18)(13,16)(17,20)(21,23,27,33)(22,28,32,35)(24,25,34,26)(29,30,36,31)(5,8,9,16)(6,11,12,20)(7,13,14,15)(10,17,18,19)(21,24)(22,29)(23,25)(26,33)(27,34)(28,30)(31,35)(32,36)(7,14)(10,18)(13,15)(17,19)(23,33)(24,34)(28,35)(29,36) involution — undirected(6,12)(10,18)(11,20)(17,19) 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.