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