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