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