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