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