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