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