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