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