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