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