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