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