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