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