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