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