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