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