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