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