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