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