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