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)(21,22,26,31)(23,32,29,28)(24,35,36,34)(25,30,27,33)(2,4)(5,7)(6,10)(8,14)(9,13)(11,17)(12,16)(15,19)(18,20)(21,23)(22,28)(24,30)(25,35)(26,29)(27,34)(31,32)(33,36) involution — undirected(7,13)(8,15)(10,16)(11,18)(21,24,27,32,26,36,25,28)(22,29,30,35,31,23,33,34)(5,8,9,15)(6,11,12,18)(7,14,13,19)(10,17,16,20)(23,29)(24,36)(28,32)(34,35)(7,13)(10,16)(14,19)(17,20)(21,25,26,27)(22,30,31,33)(23,34,29,35)(24,28,36,32)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.