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