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