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