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