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