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