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