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