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