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