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