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