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