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