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