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