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