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