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)(23,33)(24,29)(25,35)(26,31)(27,32)(28,30)(34,36) involution — undirected(5,7)(6,11)(8,15)(9,18)(10,16)(12,19)(13,14)(17,20)(21,23,27,31)(22,26,32,33)(24,25,34,28)(29,30,36,35)(1,2,3,4)(21,24,28,23,27,34,25,31)(22,29,30,33,32,36,35,26)(5,8,10,9)(6,12,13,17)(7,15,16,18)(11,19,14,20)(21,25,27,28)(22,30,32,35)(23,34,31,24)(26,36,33,29)(5,9,10,8)(6,12,13,17)(7,15,16,18)(11,20,14,19)(21,26,28,29,27,33,25,36)(22,31,30,24,32,23,35,34)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.