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