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