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