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