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