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