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