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