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