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