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