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