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