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