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