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