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