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