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)(21,22,26,30,27,29,25,34)(23,31,33,35,32,36,24,28)(5,7)(6,10)(8,15)(9,14)(11,19)(12,18)(13,16)(17,20)(21,23,27,32)(22,28,29,35)(24,25,33,26)(30,36,34,31)(2,4)(5,8)(6,11)(7,13)(9,16)(10,17)(12,20)(14,15)(18,19)(22,29)(23,32)(24,33)(30,34) involution — undirected(8,16)(11,20)(13,15)(17,19)(21,24,26,23,27,33,25,32)(22,28,30,31,29,35,34,36)(6,12)(7,14)(11,20)(13,15)(21,25,27,26)(22,30,29,34)(23,24,32,33)(28,31,35,36)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.