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