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