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