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