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