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