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