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