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