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