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