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