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