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