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