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