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