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