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