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