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