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