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