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