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