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