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