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