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