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