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