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