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