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