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)(21,22,27,28,26,32,25,31)(23,24,30,36,33,29,34,35)(5,7)(6,10)(8,15)(9,14)(11,19)(12,18)(13,16)(17,20)(22,28)(23,33)(24,35)(25,27)(29,36)(31,32) involution — undirected(1,2,3,4)(5,8)(6,11)(7,13)(9,16)(10,17)(12,20)(14,15)(18,19)(21,23,26,33)(22,29,32,24)(25,34,27,30)(28,35,31,36)(8,16)(11,20)(13,15)(17,19)(21,24,25,35,26,29,27,36)(22,30,31,23,32,34,28,33)(6,12)(7,14)(11,20)(13,15)(21,25,26,27)(22,31,32,28)(23,30,33,34)(24,36,29,35)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.