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