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