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