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