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