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