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