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