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