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