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