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