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)(23,33,34,36)(24,29,35,28)(25,30)(26,32)(27,31)(1,2)(3,4)(5,7)(6,10)(8,14)(9,15)(11,19)(12,13)(16,18)(17,20)(21,23)(22,28)(24,27)(25,35)(26,34)(29,32)(30,36)(31,33) involution — undirected(2,4)(5,8)(6,11,12,16)(7,14)(9,17)(10,18,13,19)(15,20)(21,24,25,34,26,35,27,23)(22,29,30,36,32,28,31,33)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.