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