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