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