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)(23,30)(24,26)(25,29)(27,35)(28,34)(31,36)(32,33)(1,2)(3,4)(5,7)(6,10)(8,14)(9,15)(11,18)(12,13)(16,19)(17,20)(22,24)(23,31)(29,35)(33,34) involution — undirected(2,4)(21,23,27,34,26,31,25,33)(22,28,29,30,24,32,35,36)(5,8,9,17)(6,11,12,16)(7,14,15,20)(10,18,13,19)(21,24,26,22)(23,32,31,28)(25,29,27,35)(30,34,36,33)(2,4)(7,15)(10,13)(14,20)(18,19)(21,25,26,27)(22,29,24,35)(23,33,31,34)(28,30,32,36)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.