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