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