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